---
name: "Dict.exists"
section: "3kaya"
platform: "linux"
package: "kaya"
version: "0.4.4-6.2"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/Dict.exists"
---

# Dict.exists(3kaya)

Check if a key exists in a dictionary.

## NAME

Dict::exists - Check if a key exists in a dictionary.

## SYNOPSIS

**Bool exists(** *Dict\<a, b\>  dict, a key* **)**

## ARGUMENTS

**dict** A dictionary

**key** The key to lookup

## DESCRIPTION

Check if a key exists in a dictionary and returns true if it does.

## AUTHORS

Kaya standard library by Edwin Brady, Chris Morris and others (kaya@kayalang.org). For further information see http://kayalang.org/

## LICENSE

The Kaya standard library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License (version 2.1 or any later version) as published by the Free Software Foundation.

## RELATED

**Dict.Dict (3kaya)**

**Dict.add (3kaya)**

**Dict.delete (3kaya)**

**Dict.empty (3kaya)**

**Dict.entries (3kaya)**

**Dict.keys (3kaya)**

**Dict.lookup (3kaya)**

**Dict.new (3kaya)**

**Dict.vals (3kaya)**